package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * 菜品管理
 */
@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;


    /**
     * 新增菜品
     *
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());

        dishService.saveWithFlavor(dishDto);
        // 清理所有菜品缓存数据
        // Set keys = redisTemplate.keys("dish_*");
        // redisTemplate.delete(keys);

        // 清理某个分类下面的缓存
        String key = "dish_" + dishDto.getCategoryId() + "_" + 1;
        redisTemplate.delete(key);

        return R.success("新增菜品成功");
    }

    /**
     * 菜品信息分页查询
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    private R<Page<DishDto>> page(int page, int pageSize, String name) {
        // 构造分页构造器
        Page<Dish> pageInfo = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>(page, pageSize);

        // 构造条件构造器
        LambdaQueryWrapper<Dish> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        // 添加过滤条件
        lambdaQueryWrapper.like(StringUtils.isNotEmpty(name), Dish::getName, name);
        // 添加排序条件
        lambdaQueryWrapper.orderByDesc(Dish::getUpdateTime);
        // 执行分页查询
        dishService.page(pageInfo, lambdaQueryWrapper);

        // 对象拷贝
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");

        List<Dish> records = pageInfo.getRecords();

        List<DishDto> list = records.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item, dishDto);

            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);


        return R.success(dishDtoPage);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     *
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id) {
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    /**
     * 修改菜品
     *
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());

        dishService.updateWithFlavor(dishDto);
        // 清理所有菜品缓存数据
        // Set keys = redisTemplate.keys("dish_*");
        // redisTemplate.delete(keys);

        // 清理某个分类下面的缓存
        String key = "dish_" + dishDto.getCategoryId() + "_" + 1;
        redisTemplate.delete(key);

        return R.success("修改菜品成功");
    }

    /**
     * 起售 停售功能
     * 包含 批量起售
     *
     * @param ids
     * @return
     */
    @PostMapping("/status/{status}")
    public R<String> status(@RequestParam List<Long> ids, @PathVariable Integer status) {
        log.info("status:{}", status);

        /* for (Long id : ids) {
            Dish dish = new Dish(id, intSta);
            dishService.updateById(dish);
        } */

        // 使用lambda构造器进行更新
        LambdaUpdateWrapper<Dish> lambdaUpdateWrapper = new LambdaUpdateWrapper<>();
        lambdaUpdateWrapper.in(Dish::getId, ids).set(Dish::getStatus, status);
        dishService.update(lambdaUpdateWrapper);

        // 清理所有菜品缓存数据
        Set keys = redisTemplate.keys("dish_*");
        redisTemplate.delete(keys);


        return R.success("状态更新成功");
    }

    /**
     * 删除菜品功能
     * 包含 批量删除
     *
     * @return
     */
    @DeleteMapping
    private R<String> delete(@RequestParam List<Long> ids) {
        dishService.deleteWithFlavor(ids);
        // 清理所有菜品缓存数据
        Set keys = redisTemplate.keys("dish_*");
        redisTemplate.delete(keys);


        return R.success("菜品删除成功");
    }

    /**
     * 根据条件查询对应的菜品数据
     *
     * @param dish
     * @return
     */
    @GetMapping("/list")
    private R<List<DishDto>> list(Dish dish) {
        List<DishDto> dishDtoList = null;

        // 动态构造 key
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus(); // dish_1640162835465244674_1
        // 先从 redis 中获取数据
        Object o = redisTemplate.opsForValue().get(key);
        dishDtoList = (List<DishDto>) o;

        if (dishDtoList != null) {
            // 如果存在,直接返回 无需查询
            return R.success(dishDtoList);
        }


        // 构造查询条件对象
        LambdaQueryWrapper<Dish> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        // 添加条件,查询状态为1 (起售状态)
        lambdaQueryWrapper.eq(Dish::getStatus, 1);
        // 添加排序条件
        lambdaQueryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(lambdaQueryWrapper);


        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item, dishDto);

            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            // 当前菜品id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper1 = new LambdaQueryWrapper<>();
            lambdaQueryWrapper1.eq(DishFlavor::getDishId, dishId);
            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper1);
            dishDto.setFlavors(dishFlavorList);
            return dishDto;
        }).toList();

        // 如果不存在 查询数据库 将查询到的菜品数据缓存到 redis
        redisTemplate.opsForValue().set(key, dishDtoList, 60, TimeUnit.MINUTES);

        return R.success(dishDtoList);
    }
}
